The 90-minute special, Location Location Location: A Survival Guide, saw presenters Kirstie Allsopp and Phil Spencer advising viewers how to minimise the effects of the downturn in the housing market.
It was comfortably ahead of BBC Two documentary World War Two: Behind Closed Doors, which had 1.73m (7.1%) in the 9pm hour, and the penultimate episode of Five's Unbreakable, which had 611k (2.5%).
The clear victor in the 9pm hour was I'm A Celebrity, Get Me Out Of Here! Day two of the reality competition drew an impressive 8.25m (33.8%), up signficantly on the 5.33m (22.5%) who saw The Commander in the same slot last week. BBC One's Spooks was steady with 4.95m (20.3%).
Earlier, Channel 4's new series The Ascent Of Money - about the history of global finance - began slowly with just 1.15m (4.7%). It was beaten by Five's The Gadget Show, which put in 1.31m (5.4%) for the 8pm hour.
Also ahead was BBC Two, with 2.91m (12.1%) for the latest University Challenge and 2.11m (8.7%) for the second episode of food show Indian Food Made Easy.
Hollyoaks drew 1.99m (9.3%) to Channel 4 at 6.30pm (+1: 156k, 0.8%), then E4's next look delivered 785k (4.2%) at 7pm (+1: 83k, 0.4%). On Five, Neighbours drew 1.41m (8.7%) and Home & Away picked up 1m (5.1%).
ITV1 remained in first place through primetime with an average share of 29.1% (last week: 25.1%). BBC One was second with 22.7% (23%), followed by BBC Two on 7.1% (7%), Channel 4 on 6.4% (8.1%) and Five on 4% (3.3%).
First-look Spooks was the top multichannel draw, with 836k (7.3%) from 10.30pm, and on ITV2, I'm A Celebrity Get Me Out Of Here Now! logged 549k (3.5%) for the 10pm hour (+1: 44k, 0.6%).
Ratings data supplied by Attentional